Adobe acrobat 7.0.5 sdk User Manual

Accessibility

You can enable this option using Acrobat JavaScript’s doc object’s encryptForRecipients 
method. This method allows you to control whether content can be extracted for use by 
applications that, for example, read text aloud. 

For more information, see the 

Acrobat exports COM objects in order to make the content of a PDF file available to 
assistive technology. An accessibility application such as a screen reader can interface with 
Acrobat through Microsoft’s Active Accessibility (MSAA) interface, using MSAA objects that 
Acrobat exports, or directly through exported COM objects that allow access to the PDF’s 
internal structure, called the document object model, or DOM.

Information about the underlying PDF structure is made available through direct COM 
objects that represent the PDF DOM. 

The DOM accessibility interfaces provide more extensive access. The DOM and MSAA 
models are related, and a developer can use either or both. Acrobat issues notifications to 
accessibility clients about signigicant events occurring in the PDF file window, and 
responds to requests from such clients.

For more information, see Reading PDF Through COM Accessibility Interfaces.